README.md

@@ -7,6 +7,11 @@ Small tools needed to solve immediate tasks independently or as part of a projec
 * [`confutil`.py](https://git.hmp.today/pavel.muhortov/utils#confutil-py)
 * [`sendmail`.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
 * [`simplewc`.py](https://git.hmp.today/pavel.muhortov/utils#simplewc-py)
+* [`ovpn-cert-expiration`.sh](https://git.hmp.today/pavel.muhortov/utils#ovpn-cert-expiration-sh)
+* [`ovpn-client-management`.sh](https://git.hmp.today/pavel.muhortov/utils#ovpn-client-management-sh)
+* [`ovpn-connect-handling`.sh](https://git.hmp.today/pavel.muhortov/utils#ovpn-connect-handling-sh)
+* [`wg-client-management`.sh](https://git.hmp.today/pavel.muhortov/utils#wg-client-management-sh)
+* [`wg-connect-handling`.sh](https://git.hmp.today/pavel.muhortov/utils#wg-connect-handling-sh)
 
 ____
 
@@ -151,22 +156,17 @@ ____
 |**[--file]**|mail attachment files|`None`|
 |**[--time]**|minutes of attempts to send|3|
 
-Example usage in terminal:
+Example usage in terminal with Python:
 
 ```bash
-# download
-sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/sendmail.py -O /usr/local/bin/sendmail.py
-sudo chmod +x /usr/local/bin/sendmail.py
+python3 ./sendmail.py -u user@gmail.com -p pass -d addr1@gmail.com,addr2@gmail.com
 ```
 
-```bash
-# example 1
-sendmail.py -u user@gmail.com -p pass -d addr1@gmail.com,addr2@gmail.com
-```
+Example usage in terminal with make the script executable:  
 
 ```bash
-# example 2
-/usr/local/opt/python-3.9/bin/python3.9 /usr/local/bin/sendmail.py -u user@gmail.com -p pass -d addr1@gmail.com,addr2@gmail.com --file "/path/to/file1,/path/to/file2"
+chmod u+x ./sendmail.py
+./sendmail.py -u user@gmail.com -p pass -d addr1@gmail.com,addr2@gmail.com
 ```
 
 Example usage in Python:
@@ -221,3 +221,238 @@ chmod u+x ./simplewc.py
 ./simplewc.py --domain EXAMPLE.COM --server 8.8.8.8 --keyname KEY --keydata YOU_KEY_CONTENT --test --force
 ./simplewc.py --domain EXAMPLE.COM --server dyn.dns.he.net --keyname - --keydata YOU_DDNSKEY --test --force
 ```
+
+____
+
+## `ovpn-cert-expiration`.sh
+
+**Description:**  
+> Checking openvpn server certificates expiration and preparing stats for monitoring.  
+
+**Dependencies:**  
+>
+> * privileged rights
+> * [openssl](https://www.openssl.org/) (tested version 1.1.1k on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+
+|  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
+|-----------|--------------|------------------------|---------------|
+|     1     |**[qn]**|execution without pauses||
+|     2     |**[/path/to/conf]**|openvpn server config file path|/etc/openvpn/server/server.conf|
+
+Example usage:  
+
+```bash
+# download
+sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/ovpn-cert-expiration.sh -O /etc/openvpn/server/ovpn-cert-expiration.sh
+sudo chmod +x /etc/openvpn/server/ovpn-cert-expiration.sh
+```
+
+```bash
+# sudo crontab -e
+0 * * * * bash /etc/openvpn/server/ovpn-cert-expiration.sh qn
+```
+
+```bash
+# check stats
+watch cat /var/log/openvpn/ovpn-cert-expiration.log
+```
+
+____
+
+## `ovpn-client-management`.sh
+
+**Description:**  
+> Creating or deleting client config for openvpn and sending config and info to email.  
+
+**Dependencies:**  
+>
+> * privileged rights
+> * chpasswd
+> * [openvpn](https://openvpn.net/) (tested version 2.5.1 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [easy-rsa](https://github.com/OpenVPN/easy-rsa) (tested version 3.0.8 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * tar
+> * [Python 3](https://www.python.org/downloads/) (tested version 3.9.5 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * existing [/usr/local/bin/sendmail.py](http://git.hmp.today/pavel.muhortov/utils/raw/branch/master/sendmail.py)
+
+|  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
+|-----------|--------------|------------------------|---------------|
+|     1     |**add\|del**|add or delete client config|**REQUIRED**|
+|     2     |**\<username\>**|client username|**REQUIRED**|
+|     3     |**\<password\>**|client password||
+|     4     |**[-f]**,**[--force]**|service will restart after username delete||
+
+Example usage:  
+
+```bash
+# download
+sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/ovpn-client-management.sh -O /etc/openvpn/server/ovpn-client-management.sh
+sudo chmod +x /etc/openvpn/server/ovpn-client-management.sh
+```
+
+```bash
+# create link
+ln -s /etc/openvpn/server/ovpn-client-management.sh ./ovpn
+```
+
+```bash
+# create client
+sudo ./ovpn add username password
+```
+
+```bash
+# delete client (and restart service for applying changes)
+sudo  ./ovpn del username -f
+```
+
+```bash
+# check journal
+tail -f /var/log/openvpn/ovpn.log
+```
+
+____
+
+## `ovpn-connect-handling`.sh
+
+**Description:**  
+> Handling client connection and preparing stats for monitoring.  
+
+**Dependencies:**  
+>
+> * executing by [openvpn](https://openvpn.net/) server (tested version 2.5.1 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [jq](https://github.com/stedolan/jq) (tested version 1.6 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [grepcidr](https://github.com/ryantig/grepcidr) (tested version 2.0 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [Python 3](https://www.python.org/downloads/) (tested version 3.9.5 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * existing [/usr/local/bin/sendmail.py](http://git.hmp.today/pavel.muhortov/utils/raw/branch/master/sendmail.py)
+> * [bash](https://www.gnu.org/software/bash/) (tested versions: 5.1.4 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/), 5.0.17 on [Ubuntu 20](https://wiki.ubuntu.com/FocalFossa/ReleaseNotes), 4.2.46 on [CentOS 7](https://wiki.centos.org/Manuals/ReleaseNotes/CentOS7.2009))
+
+|  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
+|-----------|--------------|------------------------|---------------|
+|     1     |**inc\|dec**|increment or decrement counter|**REQUIRED**|
+|     2     |**</path/to/dir>**|root path for counter, names, log|**REQUIRED**|
+|     3     |**[mail]**|send email notification||
+|     4     |**[geo]**|check client address geolocation||
+
+Example usage:  
+
+```bash
+# download
+sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/ovpn-connect-handling.sh -O /etc/openvpn/server/ovpn-connect-handling.sh
+sudo chmod +x /etc/openvpn/server/ovpn-connect-handling.sh
+```
+
+```bash
+# add options to openvpn server config file
+sudo tee -a /etc/openvpn/server/server.conf > /dev/null <<'EOF'
+script-security 2
+client-connect "/etc/openvpn/server/ovpn-connect-handling.sh inc /var/log/openvpn mail geo"
+client-disconnect "/etc/openvpn/server/ovpn-connect-handling.sh dec /var/log/openvpn - -"
+EOF
+sudo systemctl restart openvpn@server
+```
+
+```bash
+# check counter and names
+watch cat /var/log/openvpn/openvpn-counts.log
+# check journal
+tail -f /var/log/openvpn/ovpn-connect-handling.log
+```
+
+____
+
+## `wg-client-management`.sh
+
+**Description:**  
+> Creating or deleting client config for wireguard and sending config and info to email.  
+
+**Dependencies:**  
+>
+> * privileged rights
+> * [wireguard](https://www.wireguard.com/) (tested version 1.0.2 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [qrencode](https://github.com/fukuchi/libqrencode) (tested version 4.1.1 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [grepcidr](https://github.com/ryantig/grepcidr) (tested version 2.0 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [Python 3](https://www.python.org/downloads/) (tested version 3.9.5 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * existing [/usr/local/bin/sendmail.py](http://git.hmp.today/pavel.muhortov/utils/raw/branch/master/sendmail.py)
+
+|  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
+|-----------|--------------|------------------------|---------------|
+|     1     |**add\|del**|add or delete client config|**REQUIRED**|
+|     2     |**\<username\>**|client username|**REQUIRED**|
+|     3     |**\<address\>**|client ip address|**REQUIRED**|
+|     4     |**[-f]**,**[--force]**|service will restart after add\|del username||
+
+Example usage:  
+
+```bash
+# download
+sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/wg-client-management.sh -O /etc/wireguard/wg-client-management.sh
+sudo chmod +x /etc/wireguard/wg-client-management.sh
+```
+
+```bash
+# create link
+ln -s /etc/wireguard/wg-client-management.sh ./wg
+```
+
+```bash
+# create client
+sudo ./wg add username address
+```
+
+```bash
+# delete client and restart service
+sudo  ./wg del username address -f
+```
+
+```bash
+# check journal
+tail -f /var/log/wireguard/wg.log
+```
+
+____
+
+## `wg-connect-handling`.sh
+
+**Description:**  
+> Handling client connection and preparing stats for monitoring.  
+
+**Dependencies:**  
+>
+> * privileged rights
+> * [jq](https://github.com/stedolan/jq) (tested version 1.6 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [grepcidr](https://github.com/ryantig/grepcidr) (tested version 2.0 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * [Python 3](https://www.python.org/downloads/) (tested version 3.9.5 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
+> * existing [/usr/local/bin/sendmail.py](http://git.hmp.today/pavel.muhortov/utils/raw/branch/master/sendmail.py)
+> * [bash](https://www.gnu.org/software/bash/) (tested versions: 5.1.4 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/), 5.0.17 on [Ubuntu 20](https://wiki.ubuntu.com/FocalFossa/ReleaseNotes), 4.2.46 on [CentOS 7](https://wiki.centos.org/Manuals/ReleaseNotes/CentOS7.2009))
+
+|  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
+|-----------|--------------|------------------------|---------------|
+|     1     |**</path/to/dir>**|root path for counter, names, log|**REQUIRED**|
+|     2     |**[mail]**|send email notification||
+|     3     |**[geo]**|check client address geolocation||
+
+Example usage:  
+
+```bash
+# download
+sudo wget https://git.hmp.today/pavel.muhortov/utils/raw/branch/master/wg-connect-handling.sh -O /etc/wireguard/wg-connect-handling.sh
+sudo chmod +x /etc/wireguard/wg-connect-handling.sh
+```
+
+```bash
+# create root path for counter, names, log
+sudo mkdir /var/log/wireguard
+sudo chown -R root:root /var/log/wireguard
+sudo chmod -R 755 /var/log/wireguard
+```
+
+```bash
+# sudo crontab -e
+* * * * * bash /etc/wireguard/wg-connect-handling.sh /var/log/wireguard mail geo
+```
+
+```bash
+# check counter and names
+watch cat /var/log/wireguard/wg-counts.log
+# check journal
+tail -f /var/log/wireguard/wg-connect-handling.log
+```

build-python.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#! /bin/bash
 
 # DESCRIPTION:
 #   Building Python from sources.

ovpn-cert-expiration.sh

@@ -0,0 +1,149 @@
+#! /bin/bash
+
+# DESCRIPTION:
+#   checking openvpn server certificates expiration
+#   and
+#   preparing stats for monitoring
+#
+# DEPENDENCIES:
+#   - privileged rights
+#   - openssl
+#
+# PARAMETERS:
+#   1: "qn" - execution without pauses
+#   2: openvpn server config file path
+#
+# FUNCTIONS:
+#
+
+#######################################
+# Print message and add to log.
+# Globals:
+#   logs
+# Arguments:
+#   1: message to print and logging
+#######################################
+addtologs() {
+  echo "$(date +'%Y.%m.%d-%H:%M:%S') $1" | tee -a "${logs}"
+}
+
+#######################################
+# Waiting for press [ENTER].
+# Globals:
+#   None
+# Arguments:
+#   None
+#######################################
+execpause() {
+  read -r -p "Press [ENTER] to continue... "
+}
+
+#######################################
+# Exit procedure.
+# Globals:
+#   show
+# Arguments:
+#   None
+#######################################
+execquite() {
+  addtologs "execution time is $(($(date +%s)-time)) seconds, exit"
+  if [ "${show}" != "qn" ]; then
+    execpause
+  fi
+  exit
+}
+
+#######################################
+# Error exit procedure
+# Globals:
+#   None
+# Arguments:
+#   1: message to print and logging
+#######################################
+execerror() {
+  addtologs "error: $1"
+  execquite
+}
+
+#######################################
+# Parsing config file and creating global vars.
+# Globals:
+#   None
+# Arguments:
+#   None
+#######################################
+getconfig() {
+  cacrpath=$(grep ^ca "${conf}" | cut -d' ' -f2)
+  certpath=$(grep ^cert "${conf}" | cut -d' ' -f2)
+  statfile="$(dirname "$(grep ^log /etc/openvpn/server/server.conf | cut -d' ' -f2)")/$(basename -s .sh "$0").log"
+}
+
+#######################################
+# Checking user rights.
+# Globals:
+#   None
+# Arguments:
+#   None
+# return:
+#   0 - if privileged rights, 1 - if not privileged rights
+#######################################
+checkroot() {
+  if [ "${EUID}" -ne 0 ]; then
+    return 1 # false
+  else
+    return 0 # true
+  fi
+}
+
+#######################################
+# Print certificate expiration date in epoch
+# Globals:
+#   None
+# Arguments:
+#   1: certificate path
+#######################################
+checkcert() {
+  printf '%s\n' "$(date -d "$(openssl x509 -text -noout -in "${1}" | grep 'Not After' | cut -d':' -f2-)" +%s)"
+}
+
+#
+# VARIABLES:
+#
+
+show=$1
+conf=$2
+logs=/dev/null
+if [ -z "${conf}" ] || [ "${conf}" == "-" ]; then
+  conf=/etc/openvpn/server/server.conf
+fi
+
+time=$(date +%s)
+cd "$(dirname "$(realpath "$0")")" || execerror
+if [ ! -e "${conf}" ]; then
+  execerror "${conf} not found"
+else
+  getconfig
+fi
+
+if ! command -v openssl &> /dev/null; then
+  execerror "Not found dependencies"
+fi
+
+#
+# MAIN:
+#
+
+if checkroot; then
+  cacrtime=$(checkcert "${cacrpath}")
+  certtime=$(checkcert "${certpath}")
+  cacrremain=$(( cacrtime - time ))
+  certremain=$(( certtime - time))
+  addtologs "${cacrpath} remains only ${cacrremain} seconds"
+  addtologs "${certpath} remains only ${certremain} seconds"
+  printf '%s\n' "ca=${cacrremain}" > "${statfile}"
+  printf '%s\n' "cert=${certremain}" >> "${statfile}"
+  addtologs  "stats wrote to ${statfile}"
+  execquite
+else
+  execerror "Restart this as root!"
+fi

ovpn-client-management.sh

@@ -0,0 +1,353 @@
+#! /bin/bash
+
+# DESCRIPTION:
+#   creating or deleting client config for openvpn
+#   and
+#   sending config and info to email
+#
+# DEPENDENCIES:
+#   - privileged rights
+#   - chpasswd
+#   - openvpn
+#   - easy-rsa
+#   - tar
+#   - Python 3
+#   - existing /usr/local/bin/sendmail.py
+#
+# PARAMETERS:
+#   1: "add|del" - add or delete client config
+#   2: username - client username
+#   3: password - client password
+#   -f|--force - service will restart after username delete
+#
+# FUNCTIONS:
+#
+
+#######################################
+# Print message and add to log.
+# Globals:
+#   logs
+# Arguments:
+#   1: message to print and logging
+#######################################
+addtologs() {
+  echo "$(date +'%Y.%m.%d-%H:%M:%S') $1" | tee -a "${logs}"
+}
+
+#######################################
+# Exit procedure.
+# Globals:
+#   show
+# Arguments:
+#   None
+#######################################
+execquite() {
+  addtologs "execution time is $(($(date +%s)-time)) seconds, exit"
+  exit
+}
+
+#######################################
+# Error exit procedure
+# Globals:
+#   None
+# Arguments:
+#   1: message to print and logging
+#######################################
+execerror() {
+  addtologs "error: $1"
+  execquite
+}
+
+#######################################
+# Checking user rights.
+# Globals:
+#   None
+# Arguments:
+#   None
+# return:
+#   0 - if privileged rights, 1 - if not privileged rights
+#######################################
+checkroot() {
+  if [ "${EUID}" -ne 0 ]; then
+    return 1 # false
+  else
+    return 0 # true
+  fi
+}
+
+#######################################
+# Creating linux user
+# Globals:
+#   clientname
+#   clientpass
+# Arguments:
+#   None
+#######################################
+createuser() {
+  useradd "${clientname}" --shell /sbin/nologin
+  echo "${clientname}:${clientpass}" | chpasswd
+}
+
+#######################################
+# Creating Easy-RSA user certificate
+# Globals:
+#   easyrsadir
+#   easyrsavar
+#   easyrsaexe
+#   easyrsacap
+#   clientname
+#   clientpass
+# Arguments:
+#   None
+#######################################
+# shellcheck disable=SC2016
+createcert() {
+    cd ${easyrsadir} || execerror ""
+    sed -i -e '$aset_var EASYRSA_REQ_CN         '"${clientname}"'' ${easyrsavar}
+    ${easyrsaexe} --passout=pass:"${clientpass}" --passin=pass:${easyrsacap} build-client-full "${clientname}"
+    sed -i '/EASYRSA_REQ_CN/d' ${easyrsavar}
+}
+
+#######################################
+# Creating ovpn config file
+# Globals:
+#   easyrsadir
+#   ovpncfgdef
+#   clientname
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+createovpn() {
+  cd ${easyrsadir} || execerror ""
+  {
+    cat "${ovpncfgdef}"
+    echo -e '<ca>'
+    cat "${easyrsadir}/pki/ca.crt"
+    echo -e '</ca>\n<cert>'
+    cat "${easyrsadir}/pki/issued/${clientname}.crt"
+    echo -e '</cert>\n<key>'
+    cat "${easyrsadir}/pki/private/${clientname}.key"
+    echo -e '</key>\n<tls-auth>'
+    cat "${easyrsadir}/pki/ta.key"
+    echo -e '</tls-auth>'
+  } >> "${ovpncfgdir}/${clientname}.ovpn"
+}
+
+#######################################
+# Creating tar with config file
+# Globals:
+#   easyrsadir
+#   clientname
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+createtars() {
+  cp "${ovpncfgdir}/${clientname}.ovpn" "${ovpncfgdir}/vpn.cnf"
+  sed -i "s#auth-user-pass#auth-user-pass /config/openvpn/vpn.txt#g" ${ovpncfgdir}/vpn.cnf
+  {
+    echo -e "${clientname}"
+    echo -e "${clientpass}"
+  } >> "${ovpncfgdir}/vpn.txt"
+  cd ${ovpncfgdir} || execerror ""
+  tar cf "${clientname}.tar" --remove-files vpn.cnf vpn.txt
+}
+
+#######################################
+# Creating info file
+# Globals:
+#   easyrsadir
+#   easyrsaexe
+#   clientname
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+createinfo() {
+  cd ${easyrsadir} || execerror
+  validuntil=$(${easyrsaexe} show-cert "${clientname}" | grep "Not After" | cut -d: -f2-)
+
+faqprofile=$(cat <<END
+OpenVPN Connect client and installation instructions:
+https://openvpn.net/vpn-client/
+OpenVPN GUI client:
+https://openvpn.net/community-downloads/
+
+User Login: ${clientname}
+User Password: ${clientpass}
+Time Expired: ${validuntil}
+END
+)
+
+  echo -e "${faqprofile}" > "${ovpncfgdir}/${clientname}.info"
+}
+
+#######################################
+# Send email notification about client connect
+# Globals:
+#   clientname
+#   faqprofile
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+startsendmail() {
+  subj="[OVPN Settings] $(cat /etc/hostname): ${clientname}.ovpn client profile"
+  (
+    python3 /usr/local/bin/sendmail.py \
+    -u "$(grep "from=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -p "$(grep "pass=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -d "$(grep "dest=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --smtp "$(grep "smtp=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --port "$(grep "port=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --stls "True" \
+    --subj "${subj}" \
+    --text "${faqprofile}" \
+    --file "${ovpncfgdir}/${clientname}.ovpn,${ovpncfgdir}/${clientname}.tar" \
+    >> /dev/null 2>&1 &
+  )
+  addtologs "sent mail with subject '${subj}'"
+}
+
+#######################################
+# Deleting linux user
+# Globals:
+#   clientname
+# Arguments:
+#   None
+#######################################
+deleteuser() {
+  userdel -f -r "${clientname}"
+}
+
+#######################################
+# Deleting Easy-RSA user certificate
+# Globals:
+#   easyrsadir
+#   easyrsavar
+#   easyrsaexe
+#   easyrsacap
+#   clientname
+# Arguments:
+#   None
+#######################################
+deletecert() {
+    cd ${easyrsadir} || execerror
+    ${easyrsaexe} --batch --passin=pass:${easyrsacap} revoke "${clientname}"
+    ${easyrsaexe} --batch --passin=pass:${easyrsacap} gen-crl
+}
+
+#######################################
+# Deleting ovpn config file
+# Globals:
+#   clientname
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+deleteovpn() {
+    rm -f "${ovpncfgdir}/${clientname}.ovpn"
+}
+
+#######################################
+# Deleting tar with config file
+# Globals:
+#   clientname
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+deletetars() {
+  rm -f "${ovpncfgdir}/${clientname}.tar"
+}
+
+#######################################
+# Deleting info file
+# Globals:
+#   clientname
+#   ovpncfgdir
+# Arguments:
+#   None
+#######################################
+deleteinfo() {
+  rm -f "${ovpncfgdir}/${clientname}.info"
+}
+
+#
+# VARIABLES:
+#
+
+easyrsadir="/etc/openvpn/easy-rsa"
+easyrsaidx="${easyrsadir}/pki/index.txt"
+easyrsaexe="${easyrsadir}/easyrsa"
+easyrsavar="${easyrsadir}/vars"
+easyrsacap="openvpnca"
+ovpncfgdir="/etc/openvpn/client"
+ovpncfgdef="${ovpncfgdir}/client.conf.default"
+
+clienttodo=$1
+clientname=$2
+clientpass=$3
+
+resetforce=0
+for argument in "${@}"; do
+  case $argument in
+  -f | --force )
+    resetforce=1
+    ;;
+  -* )
+    ;;
+  esac
+done
+
+time=$(date +%s)
+logs=/dev/null
+
+#
+# MAIN:
+#
+
+if checkroot; then
+  logs=/var/log/openvpn/$(basename -s .sh "$0").log
+  if [ "${clienttodo}" == "add" ] && \
+     [ -n "${clientname}" ] && \
+     [ "${#clientpass}" -ge 8 ]; then
+    if id -u "${clientname}" >/dev/null 2>&1 || \
+       grep -w "${clientname}" ${easyrsaidx} || \
+       [ -e "${ovpncfgdir}/${clientname}.ovpn" ]; then
+      execerror "linux user or certificate or ovpn config exist, exit"
+    else
+      createuser && addtologs "created Linux user '${clientname}'"
+      createcert && addtologs "created certificate for ${clientname}"
+      createovpn && addtologs "created ovpn config file for ${clientname}"
+      createtars && addtologs "created tar with config file for ${clientname}"
+      createinfo && addtologs "created info file for ${clientname}"
+      startsendmail
+    fi
+  elif [ "${clienttodo}" == "del" ] && [ -n "${clientname}" ]; then
+    if id -u "${clientname}" >/dev/null 2>&1 || \
+       grep -w "${clientname}" ${easyrsaidx} || \
+       [ -e "${ovpncfgdir}/${clientname}.ovpn" ]; then
+      deleteuser
+      addtologs "deleted Linux user '${clientname}'"
+      deletecert && addtologs "deleted certificate for ${clientname}"
+      deleteovpn && addtologs "deleted ovpn config file for ${clientname}"
+      deletetars && addtologs "deleted tar with config file for ${clientname}"
+      deleteinfo && addtologs "deleted info file for ${clientname}"
+      if [ "${resetforce}" -eq 1 ];then
+        addtologs "restarting openvpn@server..."
+        systemctl restart openvpn@server
+      fi
+    else
+      execerror "linux user and certificate and ovpn config not exist, exit"
+    fi
+  else
+    printf "%s\n" "Usage example: $0 'add' 'username(surname)' 'password(not less 8 symbols)'"
+    printf "%s\n" "Usage example: $0 'del' 'username(surname)'"
+    printf "%s\n" "Usage example: $0 'del' 'username(surname)' -f"
+  fi
+else
+  execerror "Restart this as root!"
+fi
+execquite

ovpn-connect-handling.sh

@@ -0,0 +1,195 @@
+#! /bin/bash
+
+# DESCRIPTION:
+#   handling client connection
+#   and
+#   preparing stats for monitoring
+#
+# DEPENDENCIES:
+#   - executing by openvpn server
+#   - jq
+#   - grepcidr
+#   - Python 3
+#   - existing /usr/local/bin/sendmail.py
+#
+# PARAMETERS:
+#   1: "inc|dec" - increment or decrement counter
+#   2: root path for counter, names, log
+#   3: "mail" - send email notification
+#   4: "geo" - check client address geolocation
+#
+# FUNCTIONS:
+#
+
+#######################################
+# Print message and add to log.
+# Globals:
+#   logs
+# Arguments:
+#   1: message to print and logging
+#######################################
+addtologs() {
+  echo "$(date +'%Y.%m.%d-%H:%M:%S') $1" | tee -a "${logs}"
+}
+
+#######################################
+# Exit procedure.
+# Globals:
+#   show
+# Arguments:
+#   None
+#######################################
+execquite() {
+  addtologs "execution time is $(($(date +%s)-time)) seconds, exit"
+  exit
+}
+
+#######################################
+# Error exit procedure
+# Globals:
+#   None
+# Arguments:
+#   1: message to print and logging
+#######################################
+execerror() {
+  addtologs "error: $1"
+  execquite
+}
+
+#######################################
+# Incrementing counter with adding client name
+# Globals:
+#   counts_file
+#   common_name (variable by openvpn server)
+#   ifconfig_pool_remote_ip (variable by openvpn server)
+# Arguments:
+#   None
+#######################################
+# shellcheck disable=SC2154
+incremcounter() {
+  summary_cur=$(grep 'total=' "${counts_file}" | cut -d= -f2)
+  summary_new=${summary_cur} && (( summary_new += 1 ))
+  counts_temp=$(sed -e "s/total=${summary_cur}/total=${summary_new}/g" "${counts_file}" \
+              | sed -e '$a'"${common_name}"'_'"${ifconfig_pool_remote_ip}"'')
+  addtologs "client ${common_name} connected, counter increment to ${summary_new}"
+  printf "%s\n" "${counts_temp}" > "${counts_file}"
+}
+
+#######################################
+# Decrementing counter with deleting client name
+# Globals:
+#   counts_file
+#   common_name (variable by openvpn server)
+# Arguments:
+#   None
+#######################################
+decremcounter(){
+  summary_cur=$(grep 'total=' "${counts_file}" | cut -d= -f2)
+  summary_new=${summary_cur} && (( summary_new -= 1 ))
+  counts_temp=$(sed -e "s/total=${summary_cur}/total=${summary_new}/g" "${counts_file}" \
+              | sed '0,/'"${common_name}"'/{/'"${common_name}"'/d}')
+  addtologs "client ${common_name} disconnected, counter decrement to ${summary_new}"
+  printf "%s\n" "${counts_temp}" > "${counts_file}"
+}
+
+#######################################
+# Get information about client address
+# Globals:
+#   flaggeol
+#   untrusted_ip (variable by openvpn server)
+# Arguments:
+#   None
+#######################################
+# shellcheck disable=SC2154
+expandaddress() {
+  ipinfo="Source address is ${untrusted_ip}"
+  localnetworks="10.0.0.0/8
+                 100.64.0.0/10
+                 127.0.0.1/8
+                 172.16.0.0/12
+                 192.168.0.0/16
+                "
+  if ! grepcidr "${localnetworks}" <(echo "${untrusted_ip}") >/dev/null; then
+    if [ "${flaggeol}" == "geo" ]; then
+      ipinfo=$(curl "https://api.ipbase.com/v1/json/${untrusted_ip}")
+      if [ "$(jq -r '.country_name' <<< "$ipinfo")" != "" ]; then
+        z=$(jq -r '.zip_code' <<< "$ipinfo")
+        c=$(jq -r '.country_name' <<< "$ipinfo")
+        r=$(jq -r '.region_name' <<< "$ipinfo")
+        t=$(jq -r '.city' <<< "$ipinfo")
+        ipinfo="Source address ${untrusted_ip} is from ${z}, ${c}, ${r}, ${t}"
+      fi
+    fi
+  fi
+  addtologs "client ${common_name} checked. ${ipinfo}"
+}
+
+#######################################
+# Send email notification about client connect
+# Globals:
+#   ipinfo
+#   common_name (variable by openvpn server)
+#   ifconfig_pool_remote_ip (variable by openvpn server)
+# Arguments:
+#   None
+#######################################
+startsendmail() {
+  subj="[VPN Connected] $(cat /etc/hostname): ${common_name} connect to ${ifconfig_pool_remote_ip}"
+  (
+    python3 /usr/local/bin/sendmail.py \
+    -u "$(grep "from=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -p "$(grep "pass=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -d "$(grep "dest=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --smtp "$(grep "smtp=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --port "$(grep "port=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --stls "True" \
+    --subj "${subj}" \
+    --text "${ipinfo}" \
+    >> /dev/null 2>&1 &
+  )
+  addtologs "sent mail with subject '${subj}'"
+}
+
+#
+# VARIABLES:
+#
+
+flagmath=$1
+pathroot=$2
+flagmail=$3
+flaggeol=$4
+
+time=$(date +%s)
+logs="${pathroot}/$(basename -s .sh "$0").log"
+counts_file="${pathroot}/ovpn-counts.log"
+if [ -z "${pathroot}" ]; then
+  logs=/dev/null
+  execerror "Usage example: $0 'inc|dec' '/var/log/openvpn' '-' '-'"
+elif [ ! -e "${logs}" ]; then
+  touch "${logs}"
+fi
+
+if ! command -v curl &> /dev/null || \
+  ! command -v /usr/local/bin/sendmail.py &> /dev/null || \
+  ! command -v python3 &> /dev/null || \
+  ! command -v grepcidr &> /dev/null || \
+  ! command -v jq &> /dev/null; then
+  execerror "Not found dependencies"
+fi
+
+#
+# MAIN:
+#
+
+if [ "${flagmath}" == "inc" ]; then
+  incremcounter
+  expandaddress
+  if [ "${flagmail}" == "mail" ]; then
+    startsendmail
+  fi
+elif [ "${flagmath}" == "dec" ]; then
+  decremcounter
+else
+  execerror "Usage example: $0 'inc|dec' '/var/log/openvpn' '-' '-'"
+fi
+execquite

wg-client-management.sh

@@ -0,0 +1,284 @@
+#! /bin/bash
+
+# DESCRIPTION:
+#   creating or deleting client config for wireguard
+#   and
+#   sending config and info to email
+#
+# DEPENDENCIES:
+#   - privileged rights
+#   - wireguard
+#   - qrencode
+#   - grepcidr
+#   - Python 3
+#   - existing /usr/local/bin/sendmail.py
+#
+# PARAMETERS:
+#   1: "add|del" - add or delete client config
+#   2: username - client username
+#   3: address - client ip address
+#   -f|--force - service will restart after username add|del
+#
+# FUNCTIONS:
+#
+
+#######################################
+# Print message and add to log.
+# Globals:
+#   logs
+# Arguments:
+#   1: message to print and logging
+#######################################
+addtologs() {
+  echo "$(date +'%Y.%m.%d-%H:%M:%S') $1" | tee -a "${logs}"
+}
+
+#######################################
+# Exit procedure.
+# Globals:
+#   show
+# Arguments:
+#   None
+#######################################
+execquite() {
+  addtologs "execution time is $(($(date +%s)-time)) seconds, exit"
+  exit
+}
+
+#######################################
+# Error exit procedure
+# Globals:
+#   None
+# Arguments:
+#   1: message to print and logging
+#######################################
+execerror() {
+  addtologs "error: $1"
+  execquite
+}
+
+#######################################
+# Checking user rights.
+# Globals:
+#   None
+# Arguments:
+#   None
+# return:
+#   0 - if privileged rights, 1 - if not privileged rights
+#######################################
+checkroot() {
+  if [ "${EUID}" -ne 0 ]; then
+    return 1 # false
+  else
+    return 0 # true
+  fi
+}
+
+#######################################
+# Send email notification about client connect
+# Globals:
+#   clientname
+#   faqprofile
+# Arguments:
+#   None
+#######################################
+startsendmail() {
+  subj="[WG Settings] $(cat /etc/hostname): ${clientname} client profile"
+  (
+    python3 /usr/local/bin/sendmail.py \
+    -u "$(grep "from=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -p "$(grep "pass=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -d "$(grep "dest=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --smtp "$(grep "smtp=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --port "$(grep "port=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --stls "True" \
+    --subj "${subj}" \
+    --text "${faqprofile}" \
+    --file "/etc/wireguard/${clientname}.png,/etc/wireguard/${clientname}.conf" \
+    >> /dev/null 2>&1 &
+  )
+  addtologs "sent mail with subject '${subj}'"
+}
+
+#######################################
+# Create wireguard client certificates
+# Globals:
+#   clientname
+#   clientaddr
+#   servercfgname
+# Arguments:
+#   None
+#######################################
+createcert() {
+  wg genkey | tee "/etc/wireguard/pki/${clientname}-private.key" | wg pubkey > "/etc/wireguard/pki/${clientname}-public.key"
+  clientpublkey=$(cat "/etc/wireguard/pki/${clientname}-public.key")
+  clientprivkey=$(cat "/etc/wireguard/pki/${clientname}-private.key")
+  wg set wg0 peer "${clientpublkey}" allowed-ips "${clientaddr}/32"
+  {
+    echo -e "[Peer]"
+    echo -e "  PublicKey = ${clientpublkey}"
+    echo -e "  AllowedIPs = ${clientaddr}/32"
+  } >> ${servercfgname}
+  ip -4 route add "${clientaddr}/32" dev wg0
+}
+
+#######################################
+# Create wireguard client configuration
+# Globals:
+#   clientname
+#   clientaddr
+#   clientconfdef
+#   clientprivkey
+#   serverpublkey
+# Arguments:
+#   None
+#######################################
+createconf() {
+  clientconf=$(cat "${clientconfdef}")
+  clientconf=${clientconf//clientaddr/${clientaddr}}
+  clientconf=${clientconf//clientprivkey/${clientprivkey}}
+  clientconf=${clientconf//serverpublkey/${serverpublkey}}
+  clientconf=${clientconf//clientaddrs/${clientaddr}}
+  printf "%s\n" "${clientconf}" > "/etc/wireguard/${clientname}.conf"
+}
+
+#######################################
+# Create wireguard client info, qr-code
+# Globals:
+#   clientname
+# Arguments:
+#   None
+#######################################
+createinfo() {
+faqprofile=$(cat <<END
+WireGuard client:
+https://www.wireguard.com/install/
+END
+)
+  qrencode -o "/etc/wireguard/${clientname}.png" -t png -s 6 < "/etc/wireguard/${clientname}.conf"
+}
+
+#######################################
+# Delete wireguard client certificates
+# Globals:
+#   clientname
+#   clientpublkey
+#   servercfgname
+# Arguments:
+#   None
+#######################################
+deletecert() {
+  clientpublkey=$(cat "/etc/wireguard/pki/${clientname}-public.key")
+  clientprivkey=$(cat "/etc/wireguard/pki/${clientname}-private.key")
+  wg set wg0 peer "${clientpublkey}" remove
+  rm -f "/etc/wireguard/pki/${clientname}-public.key"
+  rm -f "/etc/wireguard/pki/${clientname}-private.key"
+  s2=$(grep -n "${clientpublkey}" ${servercfgname} | cut -d":" -f1)
+  s1=$(( s2 - 1 ))
+  s3=$(( s2 + 1 ))
+  sed -i "${s1}d;${s2}d;${s3}d" ${servercfgname}
+  ip -4 route del "${clientaddr}/32" dev wg0
+}
+
+#######################################
+# Delete wireguard client configuration
+# Globals:
+#   clientname
+# Arguments:
+#   None
+#######################################
+deleteconf() {
+  rm -f "/etc/wireguard/${clientname}.conf"
+}
+
+#######################################
+# Delete wireguard client qr-code
+# Globals:
+#   clientname
+# Arguments:
+#   None
+#######################################
+deleteinfo() {
+  rm -f "/etc/wireguard/${clientname}.png"
+}
+
+#
+# VARIABLES:
+#
+
+clienttodo=$1
+clientname=$2
+clientaddr=$3
+
+resetforce=0
+for argument in "${@}"; do
+  case $argument in
+  -f | --force )
+    resetforce=1
+    ;;
+  -* )
+    ;;
+  esac
+done
+
+time=$(date +%s)
+logs=/dev/null
+
+if ! command -v qrencode &> /dev/null || \
+  ! command -v /usr/local/bin/sendmail.py &> /dev/null || \
+  ! command -v python3 &> /dev/null; then
+  execerror "Not found dependencies"
+fi
+
+#
+# MAIN:
+#
+
+if checkroot; then
+  serverpublkey=$(cat /etc/wireguard/pki/server-public.key)
+  servercfgname="/etc/wireguard/wg0.conf"
+  clientpublkey=''
+  clientprivkey=''
+  clientconfdef="/etc/wireguard/client.conf.default"
+  logs=/var/log/wireguard/$(basename -s .sh "$0").log
+
+  if [ "${clienttodo}" == "add" ] && \
+     [ -n "${clientname}" ] && \
+     grepcidr "0.0.0.0/0" <(echo "${clientaddr}") >/dev/null; then
+    if [ -f "/etc/wireguard/${clientname}.conf" ] || \
+      grep -q -w "${clientaddr}/32" ${servercfgname}; then
+      execerror "wireguard config exist or address used, exit"
+    else
+      createcert && addtologs "created certificate for ${clientname}"
+      createconf && addtologs "created wg config file for ${clientname}"
+      createinfo && addtologs "created info file for ${clientname}"
+      startsendmail
+    fi
+    if [ "${resetforce}" -eq 1 ];then
+      addtologs "restarting wg-quick@wg0..."
+      systemctl restart wg-quick@wg0
+    fi
+  elif [ "${clienttodo}" == "del" ] && \
+     [ -n "${clientname}" ] && \
+     grepcidr "0.0.0.0/0" <(echo "${clientaddr}") >/dev/null; then
+    if [ -f "/etc/wireguard/${clientname}.conf" ]; then
+      deleteconf && addtologs "deleted wg config file for ${clientname}"
+    fi
+    if [ -f "/etc/wireguard/${clientname}.png" ]; then
+      deleteinfo && addtologs "deleted info file for ${clientname}"
+    fi
+    if grep -q -w "${clientaddr}/32" ${servercfgname}; then
+      deletecert && addtologs "deleted certificate for ${clientname}"
+    fi
+    if [ "${resetforce}" -eq 1 ];then
+      addtologs "restarting wg-quick@wg0..."
+      systemctl restart wg-quick@wg0
+    fi
+  else
+    printf "%s\n" "Usage example: $0 'add' 'username(surname)' 'address(ww.xx.yy.zz) -f'"
+    printf "%s\n" "Usage example: $0 'del' 'username(surname)' 'address(ww.xx.yy.zz)'"
+  fi
+else
+  execerror "Restart this as root!"
+fi
+execquite

wg-connect-handling.sh

@@ -0,0 +1,208 @@
+#! /bin/bash
+
+# DESCRIPTION:
+#   handling client connection
+#   and
+#   preparing stats for monitoring
+#
+# DEPENDENCIES:
+#   - privileged rights
+#   - jq
+#   - grepcidr
+#   - Python 3
+#   - existing /usr/local/bin/sendmail.py
+#
+# PARAMETERS:
+#   1: root path for counter, names, log
+#   2: "mail" - send email notification
+#   3: "geo" - check client address geolocation
+#
+# FUNCTIONS:
+#
+
+#######################################
+# Print message and add to log.
+# Globals:
+#   logs
+# Arguments:
+#   1: message to print and logging
+#######################################
+addtologs() {
+  echo "$(date +'%Y.%m.%d-%H:%M:%S') $1" | tee -a "${logs}"
+}
+
+#######################################
+# Exit procedure.
+# Globals:
+#   show
+# Arguments:
+#   None
+#######################################
+execquite() {
+  addtologs "execution time is $(($(date +%s)-time)) seconds, exit"
+  exit
+}
+
+#######################################
+# Error exit procedure
+# Globals:
+#   None
+# Arguments:
+#   1: message to print and logging
+#######################################
+execerror() {
+  addtologs "error: $1"
+  execquite
+}
+
+#######################################
+# Checking user rights.
+# Globals:
+#   None
+# Arguments:
+#   None
+# return:
+#   0 - if privileged rights, 1 - if not privileged rights
+#######################################
+checkroot() {
+  if [ "${EUID}" -ne 0 ]; then
+    return 1 # false
+  else
+    return 0 # true
+  fi
+}
+
+#######################################
+# Get information about client address
+# Globals:
+#   flaggeol
+#   show_from_addr
+#   conf_client_nm
+# Arguments:
+#   None
+#######################################
+# shellcheck disable=SC2154
+expandaddress() {
+  ipinfo="Source address is ${show_from_addr}"
+  localnetworks="10.0.0.0/8
+                 100.64.0.0/10
+                 127.0.0.1/8
+                 172.16.0.0/12
+                 192.168.0.0/16
+                "
+  if ! grepcidr "${localnetworks}" <(echo "${show_from_addr}") >/dev/null; then
+    if [ "${flaggeol}" == "geo" ]; then
+      ipinfo=$(curl "https://api.ipbase.com/v1/json/${show_from_addr}")
+      if [ "$(jq -r '.country_name' <<< "$ipinfo")" != "" ]; then
+        z=$(jq -r '.zip_code' <<< "$ipinfo")
+        c=$(jq -r '.country_name' <<< "$ipinfo")
+        r=$(jq -r '.region_name' <<< "$ipinfo")
+        t=$(jq -r '.city' <<< "$ipinfo")
+        ipinfo="Source address ${show_from_addr} is from ${z}, ${c}, ${r}, ${t}"
+      fi
+    fi
+  fi
+  addtologs "client ${conf_client_nm} checked. ${ipinfo}"
+}
+
+#######################################
+# Send email notification about client connect
+# Globals:
+#   ipinfo
+#   conf_client_nm
+#   conf_ipaddress
+# Arguments:
+#   None
+#######################################
+startsendmail() {
+  subj="[VPN Connected] $(cat /etc/hostname): ${conf_client_nm} connect to ${conf_ipaddress}"
+  (
+    python3 /usr/local/bin/sendmail.py \
+    -u "$(grep "from=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -p "$(grep "pass=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    -d "$(grep "dest=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --smtp "$(grep "smtp=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --port "$(grep "port=" /usr/local/bin/sendmail.config | cut -d= -f2)" \
+    --stls "True" \
+    --subj "${subj}" \
+    --text "${ipinfo}" \
+    >> /dev/null 2>&1 &
+  )
+  addtologs "sent mail with subject '${subj}'"
+}
+
+#
+# VARIABLES:
+#
+
+pathroot=$1
+flagmail=$2
+flaggeol=$3
+
+time=$(date +%s)
+logs="${pathroot}/$(basename -s .sh "$0").log"
+counts_file="${pathroot}/wg-counts.log"
+counts_temp=$(cat "${counts_file}")
+if [ -z "${pathroot}" ]; then
+  logs=/dev/null
+  execerror "Usage example: $0 '/var/log/wireguard' '-' '-'"
+elif [ ! -e "${logs}" ]; then
+  touch "${logs}"
+fi
+
+if ! command -v curl &> /dev/null || \
+  ! command -v /usr/local/bin/sendmail.py &> /dev/null || \
+  ! command -v python3 &> /dev/null || \
+  ! command -v grepcidr &> /dev/null || \
+  ! command -v jq &> /dev/null; then
+  execerror "Not found dependencies"
+fi
+
+#
+# MAIN:
+#
+
+if checkroot; then
+  allowed_cfg=$(find /etc/wireguard/ -name "*.conf" | grep -v "wg0.conf")
+  counter_now=0
+  clients_now=""
+  while read -r file; do
+    conf_keepalive=$(grep "PersistentKeepalive" "${file}" |cut -d"=" -f2 |tr -d " ")
+    conf_ipaddress=$(grep "Address" "${file}" |cut -d"=" -f2  |cut -d"/" -f1 |tr -d " ")
+    conf_client_nm=$(basename -s .conf "${file}")
+    show_handshake=$(wg show all dump |grep "${conf_ipaddress}" |cut -f6)
+    show_from_addr=$(wg show all dump |grep "${conf_ipaddress}" |cut -f4 |cut -d":" -f1)
+    if [ "${show_handshake}" -ne 0 ]; then
+      calc_handshake="$(date -d "-${conf_keepalive} min" +"%s")"
+      if [ "${show_handshake}" -ge "${calc_handshake}" ]; then
+	      (( counter_now ++))
+        connect_status="connected"
+        if ping -q -c 1 -W 1 "${conf_ipaddress}" > /dev/null; then
+          connect_status="connected, ping responded"
+        else
+          connect_status="connected, ping loss"
+        fi
+        clients_now+=$(printf "%s\n\r" "${conf_client_nm}_${conf_ipaddress}")
+        if ! grep -q "${conf_client_nm}_${conf_ipaddress}" <<< "${counts_temp}"; then
+          addtologs "client ${conf_client_nm} ${connect_status}"
+          expandaddress
+          if [ "${flagmail}" == "mail" ]; then
+            startsendmail
+          fi
+        fi
+      else
+        connect_status="disconnected"
+        if grep -q "${conf_client_nm}_${conf_ipaddress}" <<< "${counts_temp}"; then
+          addtologs "client ${conf_client_nm} ${connect_status}"
+        fi
+      fi
+    else
+      connect_status="never connected"
+    fi
+  done <<< "$allowed_cfg"
+  printf "%s\n" "total=${counter_now}=" > "${counts_file}"
+  printf "%s\n" "${clients_now}" >> "${counts_file}"
+else
+  execerror "Restart this as root!"
+fi
+execquite